Department of Psychiatry, Lausanne University Hospital, Lausanne, Switzerland.
Institut des Maladies Neurodégénératives, Université de Bordeaux, Bordeaux, France.
Neuropsychopharmacology. 2021 Mar;46(4):689-698. doi: 10.1038/s41386-020-00899-y. Epub 2020 Nov 9.
Addiction was suggested to emerge from the progressive dominance of habits over goal-directed behaviors. However, it is generally assumed that habits do not persist in choice settings. Therefore, it is unclear how drug habits may persist in real-world scenarios where this factor predominates. Here, we discuss the poor translational validity of the habit construct, which impedes our ability to determine its role in addiction. New evidence of habitual behavior in a drug choice setting are then described and discussed. Interestingly, habitual preference did not promote drug choice but instead favored abstinence. Here, we propose several clues to reconcile these unexpected results with the habit theory of addiction, and we highlight the need in experimental research to face the complexity of drug addicts' decision-making environments by investigating drug habits in the context of choice and in the presence of cues. On a theoretical level, we need to consider more complex frameworks, taking into account continuous interactions between goal-directed and habitual systems, and alternative decision-making models more representative of real-world conditions.
成瘾被认为是习惯逐渐支配目标导向行为的结果。然而,一般认为习惯在选择环境中不会持续存在。因此,不清楚药物习惯在这种因素占主导地位的现实场景中是如何持续存在的。在这里,我们讨论了习惯结构的不良转化效度,这阻碍了我们确定其在成瘾中的作用的能力。然后描述并讨论了药物选择环境中习惯行为的新证据。有趣的是,习惯性偏好并没有促进药物选择,而是有利于戒除。在这里,我们提出了几个线索,以将这些意外结果与成瘾的习惯理论调和起来,并强调了在实验研究中需要通过在选择背景下以及在存在线索的情况下研究药物习惯,来面对吸毒者决策环境的复杂性。在理论层面上,我们需要考虑更复杂的框架,考虑到目标导向和习惯系统之间的持续相互作用,以及更能代表现实条件的替代决策模型。